Add $a$ squared to $b$ squared to get $c$ squared, i.e., $$ a^2 + b^2 = c^2, $$ in (Plain) TeX. |
Add $a$ squared to $b$ squared to get $c$ squared, i.e., \begin{displaymath} a^2 + b^2 = c^2, \end{displaymath} or \[ \], or \begin{equation} a^2 + b^2 = c^2. \end{equation} |